CN216213920U

CN216213920U - Air extractor with electrolyte recovery function

Info

Publication number: CN216213920U
Application number: CN202122642016.0U
Authority: CN
Inventors: 赵俊凯; 韩恒珏; 冯旭东
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2021-10-29
Filing date: 2021-10-29
Publication date: 2022-04-05
Anticipated expiration: 2031-10-29

Abstract

The utility model provides an air extractor with an electrolyte recovery function, which comprises an air inlet and outlet pipeline, a recovery pipeline and a pumping and pushing part, wherein one end of the air inlet and outlet pipeline is hermetically communicated with the interior of a battery, and the other end of the air inlet and outlet pipeline can be selectively communicated with the air extracting part or the air supplying part, so that the air extractor has an air extracting state and an air supplying state; the recovery pipeline is arranged on the gas inlet and outlet pipeline and is communicated with the gas inlet and outlet pipeline; the pumping and pushing part is driven to be slidingly arranged in the recovery pipeline, a recovery cavity can be defined between the pumping and pushing part and the recovery pipeline, and the pumping and pushing part slides to enlarge the recovery cavity and recover electrolyte in an air pumping state; when the gas supply state is in, the electrolyte is pushed into the gas inlet and outlet pipeline by the pushing part, and the electrolyte flows back to the interior of the battery along with the gas supply. The air extractor with the electrolyte recovery function can recover the electrolyte flowing out during vacuumizing and send the electrolyte back to the interior of the battery, so that the electrolyte waste caused by vacuumizing the interior of the battery is reduced, and the production cost is favorably reduced.

Description

Air extractor with electrolyte recovery function

Technical Field

The utility model relates to the technical field of power batteries, in particular to an air extractor with an electrolyte recycling function.

Background

With the rapid development of electronic communication technology and new energy vehicles and other industries, lithium ion secondary batteries as main power sources have also been rapidly developed. At present, the lithium ion battery has the advantages of high specific energy, more cycle times, long storage time, large capacity of a single battery cell and the like, and is widely applied to the fields of electric bicycles, electric automobiles, mobile base stations, energy storage power stations and the like.

In the production process of the lithium ion battery, a plurality of processes need to vacuumize the interior of the battery. For example, the evacuation during the charging and discharging process can effectively solve the problem of the discharge of the gas generated during the charging and discharging process. When the sealing rubber nail is inserted, the vacuumizing can be beneficial to the insertion of the sealing rubber nail and the like.

However, when the inside of the battery is evacuated, a small amount of the electrolyte inside the battery is easily drawn out of the battery. Therefore, the electrolyte needs to be injected into the injection port for the second time according to the specific battery state, so as to maintain the necessary liquid retention amount of the electrolyte in the battery core. The electrolyte that has been drawn out is wasted, thereby increasing the production cost of the battery.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention is directed to an air extractor with an electrolyte recycling function to reduce electrolyte waste caused by vacuum-pumping inside a battery.

In order to achieve the purpose, the technical scheme of the utility model is realized as follows:

the utility model provides an air exhaust device with electrolyte retrieves function, includes business turn over trachea way, recovery pipeline to and the portion of pulling and pushing out, wherein: one end of the air inlet and outlet pipeline is hermetically communicated with the interior of the battery, the other end of the air inlet and outlet pipeline can be selectively communicated with an air extraction part or an air supply part, and the air inlet and outlet pipeline has an air extraction state for extracting air in the battery and an air supply state for blowing air into the battery; the recovery pipeline is arranged on the gas inlet and outlet pipeline and communicated with the gas inlet and outlet pipeline; the pumping and pushing part is arranged in the recovery pipeline in a driving sliding manner, a recovery cavity can be defined between the pumping and pushing part and the recovery pipeline, and in the pumping state, the pumping and pushing part slides to enlarge the recovery cavity and recover pumped electrolyte; and when the gas supply state is in the gas supply state, the pulling and pushing part slides reversely to push the electrolyte into the gas inlet and outlet pipeline, and the electrolyte flows back to the inside of the battery along with the gas supply.

Further, the air inlet and outlet pipeline is provided with a connecting section used for being communicated with the recovery pipeline, and the recovery pipeline is communicated with the circumferential bottom of the connecting section.

Furthermore, the device also comprises a driving part for driving the pulling and pushing part to slide in a reciprocating manner, and a power output end of the driving part is connected with the pulling and pushing part.

Further, the driving part adopts an air cylinder, and an air cylinder rod of the air cylinder is connected with the pulling and pushing part.

Furthermore, the drawing and pushing part adopts a piston arranged in the recovery pipeline, and a piston rod used for bearing external force to drive the piston to slide is arranged on the piston.

Further, the gas supply part is used for blowing inert gas or nitrogen into the gas inlet and outlet pipeline.

Furthermore, the business turn over trachea way with bleed portion with be equipped with the control valve between the air feed portion respectively, the control valve is used for constituting business turn over trachea way with bleed portion or switch on or break off between the air feed portion.

Further, the air exhaust part adopts a vacuum pump, and the air supply part adopts an air pump.

Furthermore, a suction nozzle is arranged on the air inlet and outlet pipeline, and the air inlet and outlet pipeline is tightly abutted to the liquid injection port of the battery through the suction nozzle and is communicated with the interior of the battery in a sealing manner.

Compared with the prior art, the utility model has the following advantages:

the air extractor with the electrolyte recovery function can recover the extracted electrolyte through the recovery cavity in the air extraction state that the air inlet and outlet pipeline is communicated with the air extraction pump to extract air from the interior of the battery, and can push the recovered electrolyte into the air inlet and outlet pipeline through the sliding push-pull part in the air supply state that the air inlet and outlet pipeline is communicated with the air supply part to supply air, so that the air supply gas blows the electrolyte into the interior of the battery, thereby reducing the electrolyte waste caused by vacuumizing the interior of the battery and being beneficial to reducing the production cost.

In addition, the recovery pipeline is communicated with the bottom of the peripheral surface of the connecting section, and electrolyte in the air inlet and outlet pipeline can flow into the recovery cavity conveniently. The arrangement of the driving part is convenient for driving the pulling and pushing part to slide. The product of cylinder is ripe, and drive effect is good. The piston has simple structure and good sealing and sliding effects.

In addition, the inert gas and the nitrogen have small influence on the electrolyte, so that the quality of the electrolyte flowing back to the inside of the battery is facilitated. The control valve is favorable for realizing the selective communication between the air inlet and outlet pipeline and the air suction part or the air supply part. The vacuum pump is favorable for realizing the vacuum pumping of the interior of the battery, and the air pump is favorable for blowing air into the interior of the battery, so that the electrolyte can flow back into the interior of the battery. The air inlet and outlet pipeline is communicated with the interior of the battery in a sealing manner through the suction nozzle, so that arrangement and implementation are facilitated, and the using effect is good.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a schematic structural diagram of an air extractor with electrolyte recycling function according to an embodiment of the present invention;

FIG. 2 is a sectional view taken along line A-A of FIG. 1;

description of reference numerals:

1. a battery; 2. an air inlet and outlet pipeline; 3. a recovery pipeline; 4. a cylinder; 5. an air extraction part; 6. an air supply part; 7. a gas pumping control valve; 8. a gas supply control valve;

201. a suction nozzle; 202. a connecting section; 203. a first branch line; 204. a second branch line;

301. a recovery chamber; 302. a piston; 3021. a piston rod;

401. a cylinder rod.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it should be noted that, if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "back", etc. appear, they are based on the orientation or positional relationship shown in the drawings and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the appearances of the terms first, second, etc. in this specification are not necessarily all referring to the same item, but are instead intended to cover the same item.

Furthermore, in the description of the present invention, the terms "mounted," "connected," and "connected" are to be construed broadly unless otherwise specifically limited. For example, the connection can be fixed, detachable or integrated; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. To those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in conjunction with specific situations.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

The utility model relates to an air extractor with electrolyte recovery function, which comprises an air inlet pipeline 2, an air outlet pipeline 3 and a pumping part. Wherein, one end of the air inlet and outlet pipeline 2 is hermetically communicated with the interior of the battery 1, and the other end of the air inlet and outlet pipeline 2 can be selectively communicated with the air extraction part 5 or the air supply part 6. The gas inlet/outlet line 2 has a gas-extracting state for extracting gas from the inside of the battery 1 and a gas-supplying state for blowing gas into the inside of the battery 1.

The recovery pipeline 3 is arranged on the air inlet and outlet pipeline 2 and is communicated with the air inlet and outlet pipeline 2. The drawing and pushing part is driven to slide in the recovery pipeline 3, and a recovery cavity 301 can be defined between the drawing and pushing part and the recovery pipeline 3. And in the air-extracting state, the extracting and pushing part slides to enlarge the recovery cavity 301 and recover the extracted electrolyte. In the gas supply state, the pushing portion slides in the reverse direction to push the electrolyte into the gas inlet and outlet line 2, and the electrolyte flows back to the inside of the battery 1 along with the gas supply.

Based on the above general description, an exemplary structure of the air extracting apparatus with the electrolyte recovery function described in the present embodiment is shown in fig. 1. For convenience of description, in the present embodiment, one end of the air inlet and outlet line 2 communicating with the inside of the battery 1 is referred to as a first end, and one end communicating with the air extracting portion 5 or the air supply portion 6 is referred to as a second end. When the air extractor is used, the battery 1 is in a vertical state, and the top of the air extractor is arranged upwards so as to facilitate air extraction operation of the battery 1.

In order to facilitate communication with the interior of the battery 1, the first end of the air inlet/outlet pipeline 2 in this embodiment is provided with a suction nozzle 201, and the air inlet/outlet pipeline 2 is tightly connected with the interior of the battery 1 through the suction nozzle 201 at the liquid filling port of the battery 1 to be in sealed communication. During concrete implementation, the suction nozzle 201 can adopt the mature glue suction nozzle 201 in the prior art, the product is mature, the installation is convenient, and the using effect is good. The diameter of the suction nozzle 201 is larger than the diameter of the liquid injection port, and is communicated with the inside of the battery 1 by abutting against the cover plate around the liquid injection port. The air inlet and outlet pipeline 2 can be a soft or hard pipeline, and can be selected according to specific use requirements during specific implementation.

The inlet and outlet gas line 2 in this embodiment has a connecting section 202 for communication with the recovery line 3. The recovery line 3 communicates with the bottom of the connecting section 202 in the circumferential direction. So set up, be convenient for electrolyte to flow into to retrieve in the chamber 301 to the realization is to most being taken out the recovery of electrolyte. Furthermore, the gas inlet and outlet lines 1 located upstream of the recovery line 3 should be arranged as far as possible without detour in order to facilitate the smooth flow of gas and electrolyte in the gas extraction state and the gas supply state.

Referring to fig. 1, the connection section 202 in this embodiment is extended in a horizontal direction, and in order to facilitate the flow of the electrolyte into the recovery chamber 301, the top end of the recovery pipe 3 is connected to the bottom of the connection section 202. The recovery pipeline 3 may be arranged to extend downward in a direction orthogonal to the connecting section 202 as shown in the figure, or may be arranged to extend obliquely downward, but the recovery pipeline 3 may be used more effectively in a manner of extending downward in consideration of the drawing effect of the drawing portion.

Of course, it is also possible to arrange the connection section 202 in an inclined manner, as long as it is possible to facilitate the flow of electrolyte into the recovery chamber 301 via the connection section 202, and the electrolyte that is pushed back into the connection section 202 can flow back into the interior of the cell 1 under the blowing of the supply gas. However, the recovery pipe 3 is preferably made of a hard material in consideration of the fact that the push-out portion is reciprocally slid in the recovery chamber 301. Thus, the recovery pipeline 3 is still not easy to deform in the sliding process of the drawing and pushing part, and has better use stability.

Referring to fig. 2, the diameter of the recovery line 3 is preferably larger than the diameter of the inlet and outlet gas line 2 in this embodiment. So arranged, the electrolyte can flow into the recovery cavity 301 conveniently. In practical application, the air-extracting speed of the air-extracting portion 5 should be as slow as possible on the premise of meeting the air-extracting requirement, so that more electrolyte flows into the recovery cavity 301.

The above-described push-out unit employs a piston 302 provided in the recovery pipe 3, and the piston 302 is provided with a piston rod 3021 for receiving an external force to slide the piston 302. Referring to fig. 2, the piston 302 in the present embodiment adopts a mature piston 302 structure in the prior art, which not only can slide in the recycling pipe 3, but also can seal the bottom of the recycling cavity 301, and has a better use effect. The piston rod 3021 is provided at the bottom of the piston 302 and extends downward so that an external driving force can be applied to the piston rod 3021.

The piston 302 has a first position at the top end of the recovery line 3 and a second position at the bottom end of the recovery line 3. In the pumping state, the piston 302 is urged to slide downward from the first position to form the recovery chamber 301. Meanwhile, the recovery cavity 301 is enlarged due to the continuous sliding of the piston 302 until the piston slides to the second position, in the process, the electrolyte can flow into the recovery cavity 301 under the action of weight, and the recovery cavity 301 recovers the extracted electrolyte. In the gas supply state, the piston 302 is urged to slide upwards from the second position to reduce the recovery chamber 301 until the piston 302 returns to the first position, at which time the electrolyte is pushed into the gas inlet/outlet pipe 2.

In order to facilitate driving the pushing portion to slide, the air extractor in this embodiment further includes a driving portion for driving the pushing portion to slide in a reciprocating manner, and a power output end of the driving portion is connected to the pushing portion. Preferably, the driving unit in the present embodiment employs a cylinder 4. At this time, the cylinder rod 401 of the cylinder 4 is connected to the drawing portion. The product of cylinder 4 is ripe, is convenient for arrange the implementation, and is better to the drive effect of pump section. In detail, referring to fig. 1 and 2, the cylinder rod 401 of the cylinder 4 extends in the height direction, and the top end of the cylinder rod 401 is connected to the piston rod 3021 to drive the piston 302 to slide up and down in the recovery pipeline 3 under the driving of the cylinder 4. Of course, the top end of the cylinder rod 401 can be directly fixed on the piston 302 without using the piston rod 3021, and the cylinder 4 can drive the piston 302.

In addition, in the present embodiment, control valves are respectively disposed between the air inlet and outlet pipeline 2 and the air extraction portion 5 and the air supply portion 6, and the control valves are used for conducting or disconnecting the air inlet and outlet pipeline 2 and the air extraction portion 5 or the air supply portion 6. As shown in fig. 1, a first branch line 203 communicates between the second end of the intake/exhaust line 2 and the air suction portion 5, and a second branch line 204 communicates between the second end and the air supply portion 6. The control valves include an air suction control valve 7 provided on the first branch pipe 203, and an air supply control valve 8 provided on the second branch pipe 204.

In specific implementation, the air extracting part 5 in this embodiment preferably adopts an air extracting pump, which is mature in product and has a good air extracting effect on the inside of the battery 1. The gas supply unit 6 is used to blow inert gas or nitrogen gas into the gas inlet/outlet line 2, and it is preferable that the gas supply unit 6 is a gas pump in which inert gas or nitrogen gas is stored. The inert gas used herein may be helium, neon, or the like. Here, when the electrolyte pushed into the air inlet/outlet pipe 2 by the piston 302 is blown by inert gas or nitrogen gas, the influence on the electrolyte is small, and the quality of the battery 1 is more favorably ensured.

It is understood that, in this embodiment, compressed air may be stored in the air pump, and at this time, the electrolyte may be blown by the compressed air, so that the electrolyte may be returned to the inside of the battery 1. However, the use of compressed air has a greater effect on the electrolyte than inert gas and nitrogen.

In order to further enhance the use effect of the air extraction device in the present embodiment, the air cylinder 4, the air extraction control valve 7, and the air supply control valve 8 can be controlled by the controller. Obviously, the control valve is an electronic control valve so as to receive a control signal from the controller to perform an opening or closing action.

In specific implementation, the controller can be a controller on the charging and discharging equipment in the prior art, and the controller can be electrically connected with the cylinder 4, the air pumping control valve 7 and the air supply control valve 8, and receives start and stop signals of the charging and discharging equipment to control the working states of the cylinder 4, the air pumping control valve 7 and the air supply control valve 8, so that the automation of the air pumping device during charging and discharging of the battery 1 is improved.

Specifically, in the air extractor of the present embodiment, when the battery 1 is charged and discharged, the air extraction control valve 7 is opened, the air supply control valve 8 is closed, the cylinder 4 is started, and the piston 302 is driven to slide downward, and at this time, the gas generated inside the battery 1 is discharged through the air inlet and outlet pipe 2 by the vacuum pump, and the electrolyte extracted by air extraction can flow into the recovery chamber 301 until the battery 1 is charged and discharged.

Next, under the control of the controller, the air suction control valve 7 is closed, the air supply control valve 8 is opened, the cylinder 4 drives the piston 302 to slide in the reverse direction, and the electrolyte in the recovery chamber 301 is pushed into the air inlet/outlet pipe 2, and at this time, the electrolyte can flow back into the battery 1 due to the gas blown into the air inlet/outlet pipe 2 by the air pump.

Air exhaust device with electrolyte recovery function, can be linked together to business turn over gas pipeline 2 and aspiration pump when carrying out the air exhaust state of bleeding to battery 1 inside, retrieve the electrolyte of being taken out through retrieving chamber 301, can also be when business turn over gas pipeline 2 and air feed portion 6 are linked together the air feed state of carrying out the air feed, push business turn over gas pipeline 2 through the electrolyte that the slip pump-out portion will be retrieved, and make the air feed gas blow in battery 1 inside with electrolyte, thereby it is extravagant to reduce the electrolyte that causes during the inside evacuation of battery 1, and do benefit to reduction in production cost.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides an air exhaust device with electrolyte retrieves function, its characterized in that includes business turn over trachea way (2), recovery pipeline (3) to and the portion of pulling and pushing out, wherein:

one end of the air inlet and outlet pipeline (2) is hermetically communicated with the interior of the battery (1), the other end of the air inlet and outlet pipeline (2) can be selectively communicated with an air extraction part (5) or an air supply part (6), and the air inlet and outlet pipeline (2) has an air extraction state for extracting air in the battery (1) and an air supply state for blowing air into the battery (1);

the recovery pipeline (3) is arranged on the air inlet and outlet pipeline (2) and is communicated with the air inlet and outlet pipeline (2);

the pumping and pushing part is arranged in the recovery pipeline (3) in a driven sliding manner, a recovery cavity (301) can be defined between the pumping and pushing part and the recovery pipeline (3), and in the pumping state, the pumping and pushing part slides to enlarge the recovery cavity (301) and recover pumped electrolyte; and in the gas supply state, the pulling and pushing part slides reversely to push the electrolyte into the gas inlet and outlet pipeline (2), and the electrolyte flows back to the inside of the battery (1) along with gas supply.

2. The air extractor with electrolyte recovery function of claim 1, wherein:

the gas inlet and outlet pipe (2) having a connecting section (202) for communicating with the recovery pipe (3),

the recovery pipeline (3) is communicated with the circumferential bottom of the connecting section (202).

3. The air extractor with electrolyte recovery function of claim 1, wherein:

the device also comprises a driving part for driving the pulling and pushing part to slide in a reciprocating manner, and a power output end of the driving part is connected with the pulling and pushing part.

4. The air extractor with electrolyte recovery function of claim 3, wherein:

the driving part adopts a cylinder (4), and a cylinder rod (401) of the cylinder (4) is connected with the pulling and pushing part.

5. The air extractor with electrolyte recovery function of claim 1, wherein:

the drawing and pushing part adopts a piston (302) arranged in the recovery pipeline (3), and a piston rod (3021) used for bearing external force to drive the piston (302) to slide is arranged on the piston (302).

6. The air extractor with electrolyte recovery function of claim 1, wherein:

the gas supply part (6) is used for blowing inert gas or nitrogen into the gas inlet and outlet pipeline (2).

7. The air extractor with electrolyte recovery function of claim 1, wherein:

business turn over trachea way (2) with bleed portion (5) with be equipped with the control valve between gas supply portion (6) respectively, the control valve is used for constituting business turn over trachea way (2) with bleed portion (5) or switch on or break off between gas supply portion (6).

8. The air extractor with electrolyte recovery function of claim 1, wherein:

the air pumping part (5) adopts a vacuum pump, and the air supply part (6) adopts an air pump.

9. The air extractor with electrolyte recovery function according to any one of claims 1 to 8, wherein:

be equipped with suction nozzle (201) on business turn over trachea way (2), business turn over trachea way (2) via suction nozzle (201) in the liquid filling mouth department of battery (1) support tightly and with battery (1) inside seal intercommunication.